HDU内部选拔赛习题.docVIP

An escape Time Limit: 2000/1000 MS (Java/Others)????Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 227????Accepted Submission(s): 56 Problem Description You are now in a maze. You mark all the blocks youve visited by @, so when you see a wall # or a visited block @ in front of you, you will make a right turn. Otherwise, that means you dont have a wall or a visited block in front, youll go forward. When you reach the door D, congratulations!#####Y@###D#####Look at the maze above, you are now in Y, facing left, and seeing a wall in front of you. You turn right, a wall again; turn right again, visited block; turn right once again, still a wall. After three continuous turnings, you realize the rest time of your life will be making turnings. ? Input The first line is T(T=20), then T cases follow.Each case has two numbers n and m(4=n,m = 20), the boundary of the maze will always be #, in the maze, there will be exactly one Y, one D. Normal blocks are marked with ..At first you are facing left. ? Output YES if you can go out of the maze(reach D). NO otherwise. ? Sample Input 2 4 4 #### #.Y# ##D# #### 4 4 #### #.Y# #D## #### ? Sample Output NO YES ? Author MadFroG Beautiful numbers Time Limit: 2000/1000 MS (Java/Others)????Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 152????Accepted Submission(s): 41 Problem Description You need to write a program which generates consecutive positive integers. Only certain digits may appear in the input and in the integers generated, and leading zeros arent allowed. And we call these numbers beautiful numbers.You are given a sequence containing the list of allowed digits, and an integer representing the current integer. Output a integer representing the first integer larger than current one consists of allowed digits only.If current represents an invalid integer according to the first paragraph, output INVALID INPUT (quotes for clarity). ? Input The input begins with an integer T(1=T=100). T